2681278463 has 2 divisors, whose sum is σ = 2681278464. Its totient is φ = 2681278462.

The previous prime is 2681278421. The next prime is 2681278469. The reversal of 2681278463 is 3648721862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2681278463 - 2¹² = 2681274367 is a prime.

It is a super-2 number, since 2×2681278463² = 14378508392295284738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2681278469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1340639231 + 1340639232.

It is an arithmetic number, because the mean of its divisors is an integer number (1340639232).

Almost surely, 2^2681278463 is an apocalyptic number.

2681278463 is a deficient number, since it is larger than the sum of its proper divisors (1).

2681278463 is an equidigital number, since it uses as much as digits as its factorization.

2681278463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 47.

The square root of 2681278463 is about 51781.0627836084. The cubic root of 2681278463 is about 1389.2507500448.

The spelling of 2681278463 in words is "two billion, six hundred eighty-one million, two hundred seventy-eight thousand, four hundred sixty-three".